As a maker of everything from microscope objective lenses to optical components for precision measuring instruments and every variety of camera lenses, Olympus poured its expertise into the Zuiko lens system. These lenses have the reputation for sharp resolution. With the addition of the computer-aided design of today's lenses, this reputation is secure through the future. The Zuiko lens development goal was to create outstanding quality, light, small, performance lenses.This Olympus Zuiko 135mm lens is used with auto bellows or an auto extension tube.